Crushing mortar and separator.



PATENTED MAR. 12, 1907.

- I No. 847,016.

f H. R. LOGAN. GRUSHING MORTAR AND SBPARATOR.

APPLICATION I'ILED.SEPT.17, 1906.

WITNESSES:

. proper fineness to .nnen R. LOGAN, or CARSON, NEVADA.

CRUSHENG NICRTAR AND SEPARATOR.

Specification of Letters Patent.

:atenteol March 12, 1907.

Application filed September 17,1906. Serial No. 334,961.

To t whom, it may concern.-

Be it known that I, HUGH R. LOGAN, a citizen of the United States,residing at OaISOll, in the county of Orms cy and State of h evada, haveinvented new and useful improvements in Crrshing Mortars and Separators, of which the following is a specification.

My invengion relates to improvements in ore and the likecrushing-mortars in which rising-and-fallin g stamp s serve to cru shthe ore which is delivered into the mortar, and in i opening forming theultimate discharge.

conjunction therewith of a device for separating that portion of the orewhich is sufficiently pulverized from the part which needs more crushingand in a means for regulating the discharge of the ore.

My invention consists in the combination of parts and in details ofconstruction,which will be more fully explained by reference to theaccompanying drawings, in which Figure 1 is avertical section of amortar,

Fig. 2 is an enlarged showing my device.

Fig. 3 1s a view of the separating device. plan view, partly brokenaway.

In apparatus of this character it is customary to employ screens of wireor punched metal having meshes sufficiently fine to allow the ore whichhas been pulverized to the pass through, the remainder being arrested bystriking against the screens and falling back into the mortar, where itis subjected to further action of the stamps, when it will pass into thescreen. Such devices are expensive and troublesome, because the splashof the particles of ore against the screen surface will break suchsurface up in a short time and make it necessary to renew the screensfrequently.

in my invention I have shown a device consisting of a series of inclinedplates 2, so fixed with relation to each other that the lower edge ofeach plate stands in sufficiently close relation with theupper surfaceof the oppositelyinclined plate below, thus forming a series of zigzagchannels from top to bottom. These plates are of such length as tosubstantially extend from end to end of the mortar and may be secured toend plates 3, by which they are supported in proper position, and .ifrequired intermediate plates might be fixed between the ends to supportthe plates 2 against undue springing.

A is a mortar of any suitable description, having a feed-opening B, dies4, fixed in the bottom of the mortar, and stamps 5, which are fixed tothe lower ends of stamp-stems, as

opening,

at 6, and are raised and allowed to drop upon the dies by the usual camor equivalent mechanism. (Not here shown.)

Upon the opposite side of the mortar from the feed-opening B is anopening which ex tends from end to end of the mortar and hasconsiderable width vertically. At a short distance in front of themortar-front and this opening is a plate 7, which is cast with the mainportion of the mortar, and this has an opening formed centrally of theplate 7, tliIis n the front of the first-named opening is fixed a boardor plate 8, which may be conveniently held by wedge-shaped keys 9,driveninto the channels in which the ends of the board 8 fit, thus forcing theboard closely against the inner sides of the channels and substantiallyclosing the main opening in the mortar-front to a point near the bottom,where this board may be supported upon lugs at each end, as at 10.

The portion 7 of the front of the mortar has the lower interior surfacecurved into a cylindrical segment, as shown at 7 and the bottom of theboard 8 is correspondingly curved, so that between the two curvatures acurved channel is formed through which the ore is forcibly ejected bythe splash caused by the falling of the stamp 5 upon the die 4. In linewith this opening is fixed the structure including theoppositely-inclined plates 2, previously described, this structure alsoresting upon the lugs 10 and secured in place by the wedging action ofthe keys or in other suitable manner. When in place, it will be seenthat the lowermost plate 2 will be in such line that the splash directedthrough the curved channel previously described will move up this plateand through the slot between this and the next inclined plate. Asuflicient quantity of water is constantly admitted into the mortar tomix with the ore, the splash being regulated in any suitable or desiredmanner, and as the ore is crushed the thin pulp that is ready to be delivered passing through these zigzag channels will eventually arrive atthe top of the separating device. The final dischargeopening, which ismade through the plate 7 and which lies in front of the main mortarhas aboard 11 fitted into it and secured by keys or equivalent device, as at12. The upper edge of this board is fixed at such height that when thelevel of the material within the mortar has reached this height theconstant impact and splash of the ore will have gradually raised thelevel of the portions to be discharged, and it arises through the slotsbetween the inclined plates 2 until it arrives at a point where it canflow over the upper edge of the board 11. The discharge is thusregulated and made constant. The attrition caused by the constantoperation of the stamps gradually wears the dies 4 down, and as thesurface of these dies forms practically alevel for the ore within themortar as these dies wear down the level of the ore will gradually bedecreased. Therefore in order to maintain the discharge over the board11 at a constant height above the tops of the dies l this boardmayeither be made to slide downwardly or boards of different heights maybe substituted, so that a constant level of the upper edge with relationto the top of the die will be maintained.

In order to insure the discharge of the pulverized ore or slime throughthe slotted structure 2, I have shown a water-inlet pipe 15, which opensinto the lower part of the mortar, as shown in Fig. 3. From the oppositeside of the mortar connection is made through a pipe 15 with upturnedsections 16 16, each having a separate discharge and controlling cocks17 17 These cocks are located at different heights.

Water being admitted into the mortar serves to moisten the ore and tomake as thin a pulp or slime of the pulverized ore as may be desired,and this is carried up through the slots of the inclined plates 2 by thepressure and flow of the water, which is determined by the opening orclosing of the cook 17 17*. When the cock 17 is opened, the discharge ofwater will take place over the board 11 with such pressure and force asis due to the height of this discharge-cock above the up per edge of theboard. Thus the finest slimes will be discharged, and the heaviermaterial not acted upon by a current of sufficient force to move it willfall back and remain within the mortar until by repeated passagesbetween the dies and stamps it will be pulverized as fine as required.If a coarser product is desired, the cock 17 may be closed and a higherone, 17, may be opened. There will then be a greater pres sure of waterwithin the mortar and a correspondingly-stronger current to carry thepulp upwardly through the openings between the inclined plates. In thismanner the fineness of the discharged product may be very accuratelyregulated.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. An ore-separating attachment for crushing mortars said attachmentincluding opposed series of oppositely-inclined plates iiXGd verticallyone above tne other and having their :lower ends overlapping andseparated to form a vertically-disposed tortuous channel for thedischarge of the crushed material.

2. The combination with a mortar having a side delivery-opening and avertical passage connecting at its lower end therewith, of a series ofopposed oppositely-inclined plates in said passage for giving a tortuouscourse to the crushed material delivered thereinto through said opening,the front wall of said passage forming a dam over the top edge of whichthe crushed material is delivered rrom the uppermost of said plates.

3. The combination with a mortar having an upwardly-curved extensionfrom the, lower portion of its front wall, opposed walls separated fromeach other to form a passage for the crushed material delivered oversaid extension, and plates fixed to each of the walls and inclinedinwardly and downwardly and having their lower ends overlapping wherebythe passage is made tortuous, the lowermost of said plates receiving thesplash of the ore and directing it upwardly to the succeeding plate,said front wall having a top overflow above the level of the uppermostof said plates.

4. The combination with a mortar having a discharge-opening in its frontof spaced members forming substantially a vertical passage whichcommunicates with said opening, a series of oppositely-inclined platesin said passage forming a tortuouspassage for the crushed material, overthe top edge of the outermost of said spaced members said material isdischarged, and means for producing a variable pressure in the passagefor regulating the flow therethrough and the final discharge of thematerial.

5. The combination with a mortar having an opening in the lower part ofits front, and spaced plates forming substantially a vertical passagewhich connects with said opening, the outermost of said plates beingremovably secured and formin a dam over the top edge of which thematerial is delivered from sald passage, means in said passage forming atortuous passage for said material, a pipe by which water is supplied tothe mortar under pressure, and discharge-pipes and cocks whereby theflow of material through said passage may be increased or diminished.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

HUGH R. LOGAN. Witnesses S. H. NoURsE, FREDERICK E. MAYNARD.

